MIL-PRF-24647E
4.4.4.3 Accelerated storage stability. Expose an original, unopened container of each individual paint or
component of the system to a temperature of 60 °C (140 °F) (nominal) continually for 30 days. Paints shall conform
to the requirements in 3.4.3.3.
4.4.4.4 Condition in container. Condition in container shall be determined in accordance with FED-STD-141,
Method 3011.3. Paint shall meet the requirements of 3.4.3.4.
4.4.5 Spraying properties. Each individual paint of the paint system shall be mixed in accordance with the
manufacturer s ASTM F718 product data sheet. Using the manufacturer s ASTM F718 designated spray equipment,
spray each paint onto individual ground-glass panels to the manufacturer s ASTM F718 recommended wet film
thickness. The panel shall be observed for spraying properties. The dry film shall be inspected for running, sagging,
blooming, blushing, bubbling, cratering, dusting, floating, fogging, hazing, mottling, orange peel appearance,
pinholing, seeding, or streaking. The test results for each individual paint shall meet the requirements o f 3.4.5.
4.4.6 Brushing properties. Each individual paint of the paint system shall be mixed in accordance with the
manufacturer s ASTM F718 product data sheet. Using the manufacturer s ASTM F718 designated equipment,
brush each paint onto individual ground-glass panels to the manufacturer s ASTM F718 recommended wet film
thickness. The brushing properties of the paint shall be determined. The dry film shall be inspected for running,
sagging, blooming, blushing, bubbling, cratering, dusting, floating, fogging, hazing, mottling, orange peel
appearance, pinholing, seeding, or streaking. The test results for each individual paint shall meet the requirements
of 3.4.6.
4.4.7 Rolling properties. Each individual paint of the paint system shall be mixed in accordance with the
manufacturer s ASTM F718 product data sheet. Using the manufacturer s ASTM F718 designated equipment, roll
each paint onto individual ground-glass panels to the manufacturer s ASTM F718 recommended wet film thickness.
The rolling properties of the paint shall be determined. The dry film shall be inspected for running, sagging,
blooming, blushing, bubbling, cratering, dusting, floating, fogging, hazing, mottling, orange peel appearance,
pinholing, seeding, or streaking. The test results for each individual paint shall meet the requirements 3.4.7.
4.4.8 Color.
4.4.8.1 Anticorrosive, tie-coat paints. Red antifouling topcoats shall be visually consistent with the pigments
used. The color of black and gray antifouling topcoat paints and individual paints (except anticorrosive topcoats in
R0 colors) shall be determined. Use at least three standard illuminants to compare the color. In case of doubt, color
differences (delta L, delta a, and delta b) shall be determined in accordance with ASTM D2244 using a D-65 light
source, a 45-degree illumination angle, and a 0-degree viewing angle. Color shall be in accordance with the
requirements of 3.4.1.a.
4.4.8.2 Color of camouflage R0 anticorrosive paints. Test panels of each R0 dark gray/black color paint shall be
prepared and allowed to cure at least 24 hours before testing. The ASTM D2244 LH value color of the R0
anticorrosive topcoats shall be determined in accordance with ASTM E1347. Before measuring the color, wet the
surface of the painted test panel with water to which a small amount of colorless surfactant has been added (a water
solution containing less than 1 percent surfactant). The area to be measured shall be completely coated with the
water film when it is inserted into the reflectometer for measurement. Check the test panel for complete water
coverage after the measurement is completed. If the water film does not completely cover the area just measured,
discard the measurement and repeat the process until a measurement is obtained on a test panel having complete
water coverage both at the start and the end of the measurement. This ASTM D2244 LH value obtained is defined
as Rw. The Rw measured shall conform to the appropriate requirements of 3.4.1.b.
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